Company lists · Data refreshed September 2026

Top 25 Scientific consulting firms based in Houston, United States

Name: Scientific consulting firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 182 companies tracked

RevenueBase identified 182 company matches for scientific consulting firms associated with Houston, United States as of September 2026 and tracks 8,272 professional contacts across them, including 4,505 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers company matches for scientific consulting firms associated with Houston, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 14, 2026 How this list was built

182Companies

8,272Contacts tracked

4,505Verified emails

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The 25 largest scientific consulting firms based in Houston, United States

Ranked by team size

Top 25 of 182 company matches for scientific consulting firms based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	LJA	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,932 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
2	Alliantgroup	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,595 contacts →
	Exact match “alliant is the nation's premier consulting and management engineering firm.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
3	Rimkus	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,184 contacts →
	Exact match “Consultants.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
4	Bge, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,112 contacts →
	Exact match “Ranked No.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
5	GSI Environmental INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	201-500	259 contacts →
	Exact match “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
6	Shah Smith & Associates, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	134 contacts →
	Exact match “Shah Smith & Associates, Inc.(SSA) is a 120+ employee Mechanical, Electrical, and Plumbing (MEP) consulting engineering firm with offices in Houston, Austin & Dallas.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
7	Edge Engineering And Science, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	116 contacts →
	Exact match “Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	EAGLE	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	112 contacts →
	Exact match “Eagle Analytical is an FDA- and DEA-registered, A2LA ISO 17025-accredited laboratory that provides analytical chemistry, microbiological testing, consulting, and technical…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
9	TCM	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	85 contacts →
	Exact match “Taylor Construction Management (TCM) is a project management consulting firm.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
10	Petral Consulting Company	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	n/a	64 contacts →
	Exact match “provides descriptions of ongoing consulting services, special projects, and areas of consulting expertise,” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
11	Aarc Environmental	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	63 contacts →
	Exact match “As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
12	RCP INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	63 contacts →
	Exact match “RCP is the regulatory compliance and risk management expert for pipelines, facilities, and terminal operations.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
13	Sage ATC Environmental Consulting	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	201-500	63 contacts →
	Exact match “Sage ATC Environmental Consulting is now Atlas.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
14	Spirit Environmental Montrose Environmental Group	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	54 contacts →
	Exact match “In July of 2024, Spirit was acquired by Onterris.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
15	Pilko & Associates	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	50 contacts →
	Exact match “We are the trusted Advisor to corporate officers and boards on mitigating Operational/EHS Risks and unlocking value for global energy, chemical and industrial companies.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
16	Riner Engineering, Inc., A UES Company	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	47 contacts →
	Exact match “Riner Engineering became part of the UES family of companies in June 2023, combining our local expertise with UES’s nationwide presence and resources.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
17	International Safety Systems, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	46 contacts →
	Exact match “International Safety Systems, Inc.(ISS) is a consulting company providing cost effective and high quality industrial hygiene and safety services to 35+ countries from its offices…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
18	Allserv	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	43 contacts →
	Exact match “At ALLSERV, we help companies reduce inventory costs, improve warehouse operations, and enhance asset availability through expert consulting and data-driven solutions.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
19	Phase Engineering, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	34 contacts →
	Exact match “Phase Engineering, LLC, was founded in 1993 and is a leading engineering and environmental consulting firm, serving clients nationwide to deliver trusted environmental solutions.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
20	UES Professional Solutions 64, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	31 contacts →
	Exact match “Environmental Consulting and Engineering InControl Technologies was established in 1997 to provide high-end quality environmental consulting services to owners of commercial and…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
21	X Celerant	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	31 contacts →
	Exact match “At X/Celerant, we help organizations in Chemicals, Construction, Manufacturing, and Energy unlock trapped value, optimize performance, and drive measurable, lasting results.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
22	Labtopia, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	51-200	27 contacts →
	Exact match “Labtopia is a technical services company providing staffing, consulting, training and informatics.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
23	Gr2 Engineering INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1-10	21 contacts →
	Exact match “GR2 Engineering provides smart, expedited solutions tailored around a wide variety of technical, geographic, legislative, and environmental challenges.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
24	TGE Resources, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	21 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
25	Knighthawk Engineering, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	11-50	20 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “scientific consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 182 scientific consulting firms based in Houston, United States

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Scientific consulting firms based in Houston, United States at a glance

As of Sep 14, 2026

54.5%Verified-email coverage

45.5Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

114

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 182 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Houston, United States whose business descriptions match “scientific consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 4,505 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 14, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Scientific consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “scientific consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many scientific consulting firms are there based in Houston, United States?

RevenueBase identified 182 company matches for scientific consulting firms associated with Houston, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

LJA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most scientific consulting firms?

Houston leads the United States with 182 company records, followed by New York (125) and San Diego (95).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,505 professional contacts with verified work emails tracked across these 182 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.